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This drawing of the Mars Science Laboratory mission's rover, Curiosity, indicates the location of science instruments and some other tools on the car-size rover.

Clockwise from upper left:

Mastcam is the Mast Camera instrument

ChemCam is the Chemistry and Camera instrument

RAD is the Radiation Assessment Detector instrument

CheMin is the Chemistry and Mineralogy instrument

SAM is the Sample Analysis at Mars instrument

DAN is the Dynamic Albedo of Neutrons instrument

MARDI is the Mars Descent Imager instrument

MAHLI is the Mars Hand Lens Imager instrument

APXS is the Alpha Particle X-ray Spectrometer instrument

The brush, drill, sieves and scoop are tools on the rover's robotic arm

REMS is the Rover Environmental Monitoring Station

The Mars Science Laboratory spacecraft is being prepared for launch during the period Nov. 25 to Dec. 18, 2011. In a prime mission lasting one Martian year -- nearly two Earth years -- after landing, researchers will use the rover's tools to study whether the landing region has had environmental conditions favorable for supporting microbial life and for preserving clues about whether life existed.